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Last seen: Jun 26, 2026
Hi @harleecooper, you'll get some help here. But it may be well worth getting in an expert in renewable heating to look at the system set up and commi...
Refrigerant efficiency is quoted in absolute terms with reference to the refrigerant properties. There are many more variables that determine the over...
Welcome @biagg from a fellow Grant 10kW Aerona owner. The key with the Aerona is to have all radiators and thermostats constantly calling for heat a...
Great news @crimson on the primary flow. Get well soon in what hopefully is a warmer house. I need to research that LLH to see what internals could im...
All pipework on CH and DHW side in plant room that can get warm, flow and return, even expansion vessel connections, should be insulated. heat lost an...
Thanks @crimson, buried primary piping looks a proper product, probably Isoflow or similar. Good. Primary flow must be fixed #1 priority. Clean stra...
@crimson good morning. Lots of people here want this one fixed for you! What's the approximate length of buried pipework on the primary circuit under ...
Hi @crimson, sure. The formula is the sensible heat equation, to work out how much heat energy in kJ/s is being added. 9 is your flow rate as indica...
@crimson great stuff. The delta T between flow and return is high, especially when your ASHP is on low load, 1300W power consumption, that's about 1/3...
@Crimson, I hesitate to state it, but it seems like your plumbers are clueless. You need a fresh pair of eyes on the job as there's something seriousl...
Finally Grant is waking up and smelling the coffee and, when they offer their 'smart controller' option pack (which monitors primary flow rate), they ...
Hi @crimson, probably time to bite the bullet and get the system checked over by Grant. The installation manual from Grant has suggested circuits for ...
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
Thanks @susannasaunders for reviving the topic I find i...
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RE: New Build 3 Phase or 1Phase
Not so any more.... 1: It's now the...
By Transparent , 16 hours ago
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@editor Ouch, sorry to re start the tick. I had assume...
By DavidB , 2 days ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 2 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
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RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 3 days ago
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@transparent we’re still running a secure version of PH...
By Mars , 3 days ago
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RE: How quickly would you want/expect heat recovery to take from setback?
Much longer than that here. The heating isn't even on. ...
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RE: Passiv Smart Thermostat - Help & Forum Support
Obviously the weather is changeable but there's a defin...
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RE: Forum updates, announcements & issues
Get the Renewable Heating Hub heads-up on WhatsApp. I...
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RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
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RE: 15kw pump for 225m2 1990's house - over kill?
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